CN209571830U - The control circuit and wind electric converter of filter condenser in wind electric converter - Google Patents
The control circuit and wind electric converter of filter condenser in wind electric converter Download PDFInfo
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- CN209571830U CN209571830U CN201920695969.3U CN201920695969U CN209571830U CN 209571830 U CN209571830 U CN 209571830U CN 201920695969 U CN201920695969 U CN 201920695969U CN 209571830 U CN209571830 U CN 209571830U
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- 238000007599 discharging Methods 0.000 claims abstract description 39
- 239000003990 capacitor Substances 0.000 claims description 18
- 238000013016 damping Methods 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 8
- 238000001914 filtration Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model provides the control circuit and wind electric converter of the filter condenser in a kind of wind electric converter, it include: the first terminals the first power supply of connection of the first coil of first contactor, second terminals of first coil are grounded, one end of the main contacts of first contactor connects external electrical network, the other end of the main contacts of first contactor is grounded by filter condenser, one end of the normally closed auxiliary contact of first contactor connects second source, first terminals of the second coil of the other end connection second contactor of the normally closed auxiliary contact of first contactor, second terminals of the second coil are grounded, one end of the main contacts of second contactor is grounded by filter condenser, the other end of the main contacts of second contactor is grounded by discharging resistor.Above-mentioned control circuit and wind electric converter, which form the investment of discharging resistor and the investment of filter condenser, to be interlocked, to reduce the power consumption of discharging resistor when filter condenser is devoted oneself to work.
Description
Technical field
The utility model relates to power electronics fields, more particularly, the filtering being related in a kind of wind electric converter
The control circuit of capacitor and wind electric converter including the control circuit.
Background technique
In common wind power converter control system, the current fluctuation meeting of the filter capacitor branch of wind electric converter net side
It is influenced by power network current quality, in fact it could happen that overcurrent, phenomena such as harmonic content is high.In view of the interface and current transformer of controller
The limitation of cabinet body is generally divided into two kinds to the protection of filter capacitor branch at present: fuse and contactor protection, contactor and electricity
Flow Hall protection.
In above-mentioned protected mode, contactor switching frequency is more, due to generally not having arc-control device inside contactor,
The dash current that filter capacitor branch generates during switching has very big percussion to the moving contact of contactor.Also,
Since filter capacitor branch harmonic wave is larger, cause dash current instantaneous value very big, has been more than short-circuit capacity and the segmentation of contactor
Ability.Therefore, as switching frequency increases, the contact that will lead to contactor is black by bright alteration, and the silver-plated melting of contact causes not
It can disjunction.
Utility model content
The purpose of this utility model is that proposing the control circuit and wind of the filter condenser in a kind of wind electric converter
Electric converter can effectively reduce the rush of current and voltage of filter capacitor branch road during contactor puts into and cuts out
Impact, while protecting contactor, can also realize the protection to filter condenser.
The one side of the utility model exemplary embodiment provides a kind of control of the filter condenser in wind electric converter
Circuit, including first contactor, second contactor and discharging resistor, wherein the first of the first coil of first contactor connects
Line end connects the first power supply, and the second terminals ground connection of first coil, one end of the main contacts of first contactor connects external electrical
The other end of net, the main contacts of first contactor is grounded by filter condenser, and the one of the normally closed auxiliary contact of first contactor
End connection second source, the first of the second coil of the other end connection second contactor of the normally closed auxiliary contact of first contactor
Terminals, the second terminals ground connection of the second coil, one end of the main contacts of second contactor are grounded by filter condenser, the
The other end of the main contacts of two contactors is grounded by discharging resistor.
Optionally, the control circuit can further include third contactor, damped resistor and time-delay relay, wherein the
First terminals of the tertiary coil of three contactors connect second source, the second terminals ground connection of tertiary coil, third contact
Described one end of the main contacts of one end connection first contactor of the main contacts of device, the other end of the main contacts of third contactor connect
Connect one end of damped resistor, the other end of the main contacts of the other end connection first contactor of damped resistor, third
One end of the normally opened auxiliary contact of contactor connects second source, and the other end connection of the normally opened auxiliary contact of third contactor is prolonged
When relay delay coil the first terminals, time-delay relay delay coil the second terminals ground connection, be delayed relay
One end of the normally opened contact of device connects the first power supply, and the of the other end connection first contactor of the normally opened contact of time-delay relay
First terminals of one coil.
Optionally, the energization delay time of the delay coil of time-delay relay can be according to the resistance value and filtering of damped resistor
The capacitance of capacitor determines, so that the voltage of filter condenser is reaching external electrical network after being powered delay time
Phase voltage.
Optionally, the resistance value of discharging resistor can according to the capacitance of filter condenser, voltage value and discharge time come
It determines.
Optionally, the voltage value of the first power supply can be 230 volts.
Optionally, the voltage value of second source can be 24 volts.
The another aspect of the utility model exemplary embodiment provides a kind of wind electric converter, becomes including above-mentioned wind-powered electricity generation
Flow the control circuit of the filter condenser in device.
Using the control electricity of the filter condenser in the above-mentioned wind electric converter according to the utility model exemplary embodiment
The investment of discharging resistor and the investment of filter condenser are formed and are interlocked, thus in filter capacitor by road and wind electric converter
The power consumption of discharging resistor is reduced when device is devoted oneself to work.
Detailed description of the invention
By the detailed description carried out below in conjunction with the accompanying drawings, above and other objects, features and advantages of the utility model
It will become apparent, in which:
Fig. 1 shows the control circuit of the filter condenser in the wind electric converter according to the utility model exemplary embodiment
Structure chart；
Fig. 2 shows the switching logic charts according to the discharging resistor of the utility model exemplary embodiment；
Fig. 3 shows the control of the filter condenser in the wind electric converter according to the utility model another exemplary embodiment
The structure chart of circuit；
Fig. 4 shows the investment logic chart according to the filter condenser of the utility model exemplary embodiment；
Electricity of the filter condenser of wind electric converter in the prior art during investment is shown respectively in Fig. 5 A and Fig. 5 B
Corrugating figure and current waveform figure；
The filter condenser of the wind electric converter according to the utility model exemplary embodiment is shown respectively in Fig. 6 A and Fig. 6 B
Voltage oscillogram and current waveform figure during investment.
Specific embodiment
The embodiments of the present invention are described in detail next, with reference to attached drawing.
In the utility model exemplary embodiment, a kind of control electricity of the filter condenser in wind electric converter is proposed
Road, the control circuit can be realized the control to the charging process of the filter condenser in wind electric converter and the control of discharge process
System.Based on above-mentioned control circuit the electric current punching on filter condenser can be effectively reduced during contactor puts into and cuts out
It hits and voltge surge can also realize the protection to filter condenser while protecting contactor.
Fig. 1 shows the control circuit of the filter condenser in the wind electric converter according to the utility model exemplary embodiment
Structure chart.
It is introduced referring to Fig. 1 and control of discharge is carried out to the filter condenser in wind electric converter based on the control circuit
Process.
As shown in Figure 1, according to the control of the filter condenser in the wind electric converter of the utility model exemplary embodiment
Circuit includes: first contactor KM1, second contactor KM2, discharging resistor R1.
As an example, first contactor KM1 includes first coil, main contacts (normally opened) and a pair of of normally closed auxiliary contact.The
Two contactor KM2 include the second coil and main contacts (normally opened).
The connection relationship of each component in the control circuit of filter condenser in above-mentioned wind electric converter is as follows:
First terminals of the first coil of first contactor KM1 connect the first power supply, the second terminals of first coil
Ground connection.As an example, the voltage value of the first power supply can be 230 volts.
One end (that is, contact 1 of KM1, contact 3, contact 5) of the main contacts of first contactor KM1 connects external electrical network, the
One end of the other end (that is, contact 2 of KM1, contact 4, contact 6) the connection filter condenser C of the main contacts of one contactor KM1,
The other end of filter condenser C is grounded.
Here, filter condenser C can refer to the filter condenser of wind electric converter net side, that is, be used in wind electric converter
Connect the filter condenser of external electrical network (that is, power grid three-phase voltage).
One end of the normally closed auxiliary contact (that is, contact 13) of first contactor KM1 connects second source, first contactor
First terminals of the second coil of the other end (that is, contact 14) the connection second contactor KM2 of the normally closed auxiliary contact of KM1,
Second terminals of the second coil of second contactor KM2 are grounded.Optionally, the voltage value of second source can be 24 volts.
One end (that is, contact 1 of KM2, contact 3, contact 5) of the main contacts of second contactor KM2 connects filter condenser C
One end (that is, one end that filter condenser C is connected with the main contacts of first contactor KM1), the main touching of second contactor KM2
One end of the other end (that is, contact 2 of KM2, contact 4, contact 6) the connection discharging resistor R1 of point, discharging resistor R1's is another
One end connects the other end (that is, one end of filter condenser C ground connection) of filter condenser C.
Preferably, the resistance value of discharging resistor R1 can be determined according to the charge-discharge energy of filter condenser C.For example, putting
The resistance value of electric resistor R1 can be according to capacitance (that is, capacitance), voltage value and the discharge time of filter condenser C come really
It is fixed.
As an example, when remaining unchanged the voltage of filter condenser C and discharge time, the capacitance of filter condenser C
Bigger, then the resistance value of discharging resistor R1 is smaller.When remaining unchanged the capacitance of filter condenser C and discharge time, filtering
The voltage of capacitor C is bigger, then the resistance value of discharging resistor R1 is bigger.When the capacitance and voltage of filter condenser C are kept not
When change, the discharge time of filter condenser C is longer, then the resistance value of discharging resistor R1 is bigger.
For example, the resistance value of discharging resistor R1 and the capacitance of filter condenser C, voltage can be indicated using following formula
Relationship between value, discharge time:
In formula (1), VaIndicate the voltage value of filter condenser C, VuIndicate the phase voltage of external electrical network, R1Indicate electric discharge
The resistance value of resistor R1, C indicate the capacitance of filter condenser C, t1When indicating the electric discharge discharged filter condenser C
Between.
As an example, the power more large scale of general resistor is also bigger, correspondingly the price of resistor is also higher.One
In preferred embodiment, by the discharge time for comprehensively considering the power of resistor, size, cost, the capacity of capacitor and circuit
Etc. factors, power can be chosen no more than 20 watts of resistor as discharging resistor R1.
In above-mentioned control circuit, touched using the normally closed auxiliary of the first contactor KM1 of the switching of control filter condenser C
Point, come control the switching for controlling discharging resistor R1 second contactor KM2 coil electric and power loss, that is,
It says, the investment of discharging resistor R1 and the investment of filter condenser C is formed and interlocked, to devote oneself to work in filter condenser
When, reduce the power consumption on discharging resistor R1.
Fig. 2 shows the switching logic charts according to the discharging resistor of the utility model exemplary embodiment.
It is introduced below with reference to Fig. 1 and Fig. 2 based on above-mentioned control circuit and controls the process of discharging resistor R1 switching.
When the first coil of first contactor KM1 obtains electric, the main contacts of first contactor KM1 is closed, filter condenser C
Investment, that is, filter condenser C is linked into external electrical network at this time.At the same time, the normally closed auxiliary contact of first contactor KM1
It disconnects, so that the second coil losing electricity of second contactor KM2, the main contacts of second contactor KM2 is disconnected, then discharging resistor R1
It cuts out.
When the first coil power loss of first contactor KM1, the main contacts of first contactor KM1 is disconnected, filter condenser C
It cuts out, that is, filter condenser C is disconnected with external electrical network at this time.At the same time, the normally closed auxiliary touching of first contactor KM1
Point closure, so that the second coil of second contactor KM2 obtains electric, the main contacts of second contactor KM2 closure, then discharging resistor
R1 investment, filter condenser C is discharged by discharging resistor R1 at this time.
As an example, first can be controlled by the controller (for example, programmable logic controller (PLC) PLC) in wind electric converter
The first coil of contactor KM1 obtains electric and power loss.
Based on above-mentioned switching logical course, the loss on discharging resistor R1 is smaller, selects to discharging resistor R1
When type, the biggish resistor of power ratio can choose, that is to say, that under identical voltage class, discharging resistor be can choose
The resistor of smaller resistance value.
Fig. 3 shows the control of the filter condenser in the wind electric converter according to the utility model another exemplary embodiment
The structure chart of circuit.
It is introduced referring to Fig. 3 and charge control is carried out to the filter condenser in wind electric converter based on the control circuit
Process.
As shown in figure 3, according to the filter condenser in the wind electric converter of the utility model another exemplary embodiment
Control circuit includes: first contactor KM1, second contactor KM2, third contactor KM3, time-delay relay K1, filter capacitor
Device C, discharging resistor R1 and damped resistor R2.
As an example, time-delay relay K1 is the relay of on-delay type, time-delay relay K1 includes delay coil
And normally opened contact.Third contactor KM3 includes tertiary coil and main contacts (normally opened).
The connection relationship of each component in the control circuit of filter condenser in above-mentioned wind electric converter is as follows:
One end (that is, contact 1 of KM1, contact 3, contact 5) of the main contacts of first contactor KM1 connects external electrical network, the
One end of the other end (that is, contact 2 of KM1, contact 4, contact 6) the connection filter condenser C of the main contacts of one contactor KM1,
The other end of filter condenser C is grounded.
One end of the normally closed auxiliary contact (that is, contact 13) of first contactor KM1 connects second source, first contactor
First terminals of the second coil of the other end (that is, contact 14) the connection second contactor KM2 of the normally closed auxiliary contact of KM1,
Second terminals of the second coil of second contactor KM2 are grounded.
One end (that is, contact 1 of KM2, contact 3, contact 5) of the main contacts of second contactor KM2 connects filter condenser C
One end (that is, one end that filter condenser C is connected with the main contacts of first contactor KM1), the main touching of second contactor KM2
One end of the other end (that is, contact 2 of KM2, contact 4, contact 6) the connection discharging resistor R1 of point, discharging resistor R1's is another
One end connects the other end (that is, one end of filter condenser C ground connection) of filter condenser C.
First terminals of the tertiary coil of third contactor KM3 connect second source, the third line of third contactor KM3
The second terminals ground connection of circle.
One end (that is, contact 1 of KM3, contact 3, contact 5) of the main contacts of third contactor KM3 connects first contactor
One end (that is, contact 1 of KM1, contact 3, contact 5) of the main contacts of KM1, the other end of the main contacts of third contactor KM3
(that is, contact 2 of KM3, contact 4, contact 6) connects one end of damped resistor R2, the other end connection the of damped resistor R2
The other end (that is, contact 2 of KM1, contact 4, contact 6) of the main contacts of one contactor KM1.
One end (that is, contact 11 of KM3) of the normally opened auxiliary contact of third contactor KM3 connects second source, and third connects
The first of the delay coil of the other end (that is, contact 12 of KM3) the connection time-delay relay K1 of the normally opened auxiliary contact of tentaculum KM3
Terminals, the second terminals ground connection of the delay coil of time-delay relay K1.
One end of the normally opened contact of time-delay relay K1 connects the first power supply, the normally opened contact of time-delay relay K1 it is another
First terminals of the first coil of end connection first contactor KM1, the second terminals of the first coil of first contactor KM1
Ground connection.
Fig. 4 shows the investment logic chart according to the filter condenser of the utility model exemplary embodiment.
It is introduced below with reference to Fig. 3 and Fig. 4 based on above-mentioned control circuit and controls the process of discharging resistor R1 switching.
When the tertiary coil of third contactor KM3 obtains electric, the main contacts of third contactor KM3 is closed, damped resistor
R2 investment, filter condenser C is linked into external electrical network via damped resistor R2 at this time.In the case, external electrical network passes through
Filter condenser C is pre-charged by damped resistor R2.
At the same time, the normally opened auxiliary contact closure of third contactor KM3, so that the delay coil of time-delay relay K1 obtains
Electricity starts timing, after reaching energization delay time, the normally opened contact closure of time-delay relay K1, so that first contactor
The first coil of KM1 obtains electric, the main contacts of first contactor KM1 closure, filter condenser C investment, and filter condenser C passes through the
One contactor KM1 is linked into external electrical network.Damped resistor R2 is short-circuited at this time, to the pre-charge process of filter condenser C
Terminate.
When the first coil of first contactor KM1 obtains electric, the normally closed auxiliary contact of first contactor KM1 is disconnected, so that
The main contacts of the second coil losing electricity of second contactor KM2, second contactor KM2 disconnects, then discharging resistor R1 is cut out.
When the normally opened contact of time-delay relay K1 disconnects, the first coil power loss of first contactor KM1,
The main contacts of first contactor KM1 disconnects, and filter condenser C is cut out, that is, filter condenser C and external electrical at this time
Net disconnects.At the same time, the normally closed auxiliary contact closure of first contactor KM1, so that the second line of second contactor KM2
Enclose electric, the main contacts closure of second contactor KM2, then discharging resistor R1 is put into, and filter condenser C passes through electric discharge electricity at this time
Resistance device R1 discharges.
Based on above-mentioned switching logical course, the main contacts of first contactor KM1 controls the switching of filter condenser C, simultaneously
Third contactor KM3 is used to control the investment of the damped resistor for the main contacts two sides for being connected in parallel on first contactor KM1, puts into suitable
Sequence are as follows: damped resistor is first put into, after damped resistor investment, by the energization delay time of time-delay relay K1, then
Put into the main contacts of first contactor KM1.
As an example, the energization delay time of the delay coil of time-delay relay K1 can be according to the resistance value of damped resistor R2
It is determined with the capacitance of filter condenser C, it in a preferred embodiment, can be by adjusting the resistance value and filter of damped resistor R2
The capacitance of wave capacitor C determines energization delay time of time-delay relay K1, so that the voltage value of filter condenser C is passing through
Cross the phase voltage for reaching external electrical network after being powered delay time.
Here, the precharge for being filter condenser C in the voltage value of the filter condenser C after the delay time that is powered
Voltage value, for example, the precharge voltage value of filter condenser C can be calculated using following formula:
In formula (2), VtIndicate the precharge voltage value of filter condenser C, VuIndicate the phase voltage of external electrical network, R2Table
Show the resistance value of damped resistor R2, C indicates the capacitance of filter condenser C, t2What expression was pre-charged filter condenser C
Charging time.
That is, be equivalent to after the main contacts closure of third contactor KM3 and constitute the charging circuit in the circuit RC,
By adjusting the resistance value of damped resistor R2, the available difference charging time, to influence final pre- of filter condenser C
Charging voltage value.When the phase voltage of voltage and external electrical network on filter condenser C is close, control filter condenser C is carried out
Switching, the rush of current of switching and voltge surge are minimum at this time.In the case, the voltage of filter condenser C can will be made to reach
To external electrical network phase voltage when charging time t be determined as energization delay time of time-delay relay K1.
In above-mentioned control circuit, in the main contacts two sides of first contactor damped resistor in parallel, pass through control resistance
The switching timing of damping resistor and the main contacts of first contactor is realized to the advanced line precharge of filter condenser, then is thrown
The charge control mode cut effectively reduces rush of current and voltge surge of the filter condenser when investment is cut out, realizes
Protection to contactor and capacitor also improves the reliability of filter capacitor branch work.
Control circuit shown in Fig. 3 is verified to filtering by emulation mode referring to Fig. 5 A and Fig. 5 B, Fig. 6 A and Fig. 6 B
The charge control effect of capacitor.
Electricity of the filter condenser of wind electric converter in the prior art during investment is shown respectively in Fig. 5 A and Fig. 5 B
Corrugating figure and current waveform figure.The wind electric converter according to the utility model exemplary embodiment is shown respectively in Fig. 6 A and Fig. 6 B
Voltage oscillogram and current waveform figure of the filter condenser during investment.Wherein, abscissa indicates that the time, (unit was the second
S), ordinate respectively indicates voltage value (unit is volt V) and current value (unit is ampere A).
In the prior art, usual filter condenser is directly connected to external electrical network via contactor, such as Fig. 5 A and Fig. 5 B institute
Show, under this connection type, puts into moment (for example, in 0.3S or so) in the filter condenser of wind electric converter, filtered electrical
There are rush of current and voltge surge on container.
When using the above-mentioned control circuit in the utility model, it is assumed that make by adjusting the size of damped resistor
After the delay time that is powered, the precharge voltage value of filter condenser is finally reached the phase electricity close to 0.98 times of external electrical network
Pressure, puts into filter condenser at this moment, as shown in Figure 6 A and 6 B, in investment moment, on filter condenser no-voltage impact and
Rush of current.
By using the above-mentioned control circuit in the utility model, contactor can be avoided according to the control of wind electric converter
When strategy and wind regime carry out frequent switching, bring voltge surge and rush of current can also extend contactor and filter capacitor
The service life of device.
A kind of wind electric converter is also provided according to the utility model exemplary embodiment, which includes above-mentioned
The control circuit of filter condenser in wind electric converter.
The control circuit and wind-powered electricity generation of filter condenser in the wind electric converter of the utility model exemplary embodiment become
Device is flowed, the switching of discharging resistor is controlled using the auxiliary contact of contactor, reduces active component in wind electric converter
Loss, improves the efficiency of wind electric converter.
In addition, according to the control circuit of the filter condenser in the wind electric converter of the utility model exemplary embodiment with
And wind electric converter, filter capacitor branch is pre-charged in advance using damped resistor in parallel, reduces switching moment pair
The rush of current and voltge surge of contactor, improve the reliability of contactor, extend the service life of contactor.
Although being particularly shown and describing the application, those skilled in the art referring to its exemplary embodiment
It should be understood that in the case where not departing from spirit and scope defined by claim form can be carried out to it
With the various changes in details.
Claims (7)
1. a kind of control circuit of the filter condenser in wind electric converter, which is characterized in that the control circuit includes first
Contactor, second contactor and discharging resistor,
Wherein, the first terminals of the first coil of first contactor connect the first power supply, the second wiring termination of first coil
Ground,
One end of the main contacts of first contactor connects external electrical network, and the other end of the main contacts of first contactor passes through filtered electrical
Receptacle ground,
One end of the normally closed auxiliary contact of first contactor connects second source, the normally closed auxiliary contact of first contactor it is another
First terminals of the second coil of end connection second contactor, the second terminals ground connection of the second coil,
One end of the main contacts of second contactor is grounded by filter condenser, and the other end of the main contacts of second contactor passes through
Discharging resistor ground connection.
2. control circuit according to claim 1, which is characterized in that the control circuit further includes third contactor, resistance
Damping resistor and time-delay relay,
Wherein, the first terminals of the tertiary coil of third contactor connect second source, the second wiring termination of tertiary coil
Ground,
Described one end of the main contacts of one end connection first contactor of the main contacts of third contactor, the main touching of third contactor
One end of the other end connection damped resistor of point, the other end of damped resistor connect the described of the main contacts of first contactor
The other end,
One end of the normally opened auxiliary contact of third contactor connects second source, the normally opened auxiliary contact of third contactor it is another
First terminals of the delay coil of end connection time-delay relay, the second terminals ground connection of the delay coil of time-delay relay,
One end of the normally opened contact of time-delay relay connects the first power supply, the other end connection of the normally opened contact of time-delay relay the
First terminals of the first coil of one contactor.
3. control circuit according to claim 2, which is characterized in that the energization of the delay coil of the time-delay relay is prolonged
The slow time determines according to the resistance value of damped resistor and the capacitance of filter condenser, so that the voltage of filter condenser exists
Reach the phase voltage of external electrical network after delay time by being powered.
4. control circuit according to claim 1, which is characterized in that the resistance value of the discharging resistor is according to filter capacitor
Capacitance, voltage value and the discharge time of device determine.
5. control circuit according to claim 1, which is characterized in that the voltage value of first power supply is 230 volts.
6. control circuit according to claim 1, which is characterized in that the voltage value of the second source is 24 volts.
7. a kind of wind electric converter, which is characterized in that including in wind electric converter described in any one of claim 1-6
The control circuit of filter condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920695969.3U CN209571830U (en) | 2019-05-15 | 2019-05-15 | The control circuit and wind electric converter of filter condenser in wind electric converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920695969.3U CN209571830U (en) | 2019-05-15 | 2019-05-15 | The control circuit and wind electric converter of filter condenser in wind electric converter |
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| Publication Number | Publication Date |
|---|---|
| CN209571830U true CN209571830U (en) | 2019-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920695969.3U Active CN209571830U (en) | 2019-05-15 | 2019-05-15 | The control circuit and wind electric converter of filter condenser in wind electric converter |
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| CN (1) | CN209571830U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111668841A (en) * | 2020-06-28 | 2020-09-15 | 上海兆铄科技有限公司 | Pre-charging resistor and damping resistor integrated device in active power filter |
-
2019
- 2019-05-15 CN CN201920695969.3U patent/CN209571830U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111668841A (en) * | 2020-06-28 | 2020-09-15 | 上海兆铄科技有限公司 | Pre-charging resistor and damping resistor integrated device in active power filter |
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